Method and device for counting number of people entering and exiting based on millimeter wave radar

Abstract

The invention discloses a method for counting the number of people entering and exiting based on a millimeter wave radar, and the method comprises the steps: carrying out the point cloud cluster tracking of a human body target, and outputting an output clustering target set; predicting and updating each target in the clustering target set by adopting an extended Kalman tracking algorithm, and acquiring the position information of the target in real time; converting the target position information from polar coordinates into a Cartesian coordinate system to obtain a tracking target set; and continuously tracking the same track ID, judging the in-out state of the tracked target according to the position and speed of the tracked target relative to the first crossing line, the second crossing line and the third crossing line, adding 1 to the number of in-out people of the tracked target in an entered state, and subtracting 1 from the number of in-out people of the tracked target in an exported state. The method comprises the following steps: allocating a unique track ID to pedestrians in a monitoring area, and judging positions and speed directions on adjacent frames; and repeated counting caused by staying at the doorway is effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of monitoring, and in particular relates to a method and device for counting the number of people entering and leaving based on a millimeter-wave radar. Background technique [0002] The existing methods for counting the number of people entering and leaving include image processing technology and infrared shooting technology. Image processing is based on optical camera imaging, which mainly uses algorithms such as target extraction, target recognition, and trajectory analysis; it is greatly affected by ambient light, and the processing process is complex and costly. Infrared shooting uses a transmitter and a receiver. If an object passes in the middle, it will block the light and output a pulse signal to trigger the counting circuit. The reflective infrared is to make the transmitter and receiver together to form an infrared probe. , when an object appears in front of the probe, it will reflect the infrare...

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